“True Blood” star Mehcad Brooks got in touch via phone with his grandmother at the most inopportune moment at the Symmetry Live event at the W Hotel Los Angeles in Westwood this week. Brooks had to pause a moment before taking photos on the red carpet because the actor, who’s dating George Clooney’s ex-girlfriend and “Dancing With the Stars” contestant Elisabetta Canalis, realized he had accidentally pocket-dialed his grandma. Observers overheard Brooks comment to himself that his granny loves to hear from him but, “clearly not when it’s late at night at a party” before handing the phone to a friend for safekeeping.